Knife-bar for beating-engines.



H. R. SIMONDS.

KNIFE BAR FOR BEATING ENGINES;

APPLICATION FILED n13.21, 1913.

Patented Apr. 14, 1914 2 SHEETS-SHBET 1.

ygbss INVENTOR $imm A llorm zo H.'R. SIMONDS.

KNIFE BAR FOR BEATING ENGINES.

APPLICATION PILED"1-EB.'2-1, 1913.

Patented Apr. 14, 1914 2 SHEETS-SHEET 2.

[N VEN TOR 3mm Allomeya HERBERT n. SIMONDS, or narrow, onro, Assrenon rornn a A. sriuonns & son CQIVIPANY, or nn'rron'onro, Accnronarron orcure.

marlin-nan ron nE'arIne-nnemns.

ncense.

Specification of Letters Patent.

Application filed. February 21, rate. Serial No. 749,916.

Patented Apr. Ml, 11914.

To all whom it may concern f Be it known that I, HERBERT R. Srraonnscitizen of the United States, residing at Dayton, in the county ofMontgomery and State of Ohio, haveinvented certain new tures hereinafterdescribed, reference being had to the accompanying drawings which showone embodiment of my invention selected by me for purposes ofillustration, to gether with a slight modification thereof,

and the said invention is fully disclosed in the following descriptionand claims.

Referring to the accompanying drawingsz-Figure 1 represents so much of abeating engine or macerating device for paper pulp as is necessary to beshown in order that a complete understanding of my invention may be.had, the said figure showing a portion of the tank with oneside removeda-nd the cylinder being provided with the improved knife bar hereinaftermore fully described. Fig. 2 represents asection on line 2-2 of Fig.1.Fig; 2 is a detailed sectional view of a portion of the mechanism. Fig.3 is. a pers ective .view of a portion of my improved nife'ba-rillustrate ing one end of the same and showing in dotted lines therelation of the spacing blocks and retaining ring thereto. Fig. 4

is a transverse sectional view of my im proved knife bar, portions ofthe spacing blocks, and the location of the retaining ring beingindicated in dotted lines. Fig. 5 represents a top plan view of aportion of the corrugated edge of one of my improved knife bars. Fig. 6is an edge view of a portion of the knife bar looking at the corrugatedportion thereof. Fig. 7 r is an end view of a' knife bar embodying aslight modification of my invention.

The object of my invention is to provide an improved knife bar for usein the rotated cylinder of a beating engine or pulp macer- ,ating devicefor the preparation of paper pulp which can be inserted in and used inthe cylinder of the ordinarycoin percial machines now in use; which isprovided with a transversely corrugated edge portion of I novelconstruction and which'is particularly designed to produce inconjunction with the Stationary knives of the machine a wiping orsweeping'action produced by holding the knife bars in the cylinder sothat they extend rearward of a radial position therein, and alsoprovidin means for insuring that the material, whic has a tendency tocollect. between adjacent blades of the cylinder, shall be continuallythrown outward by the blades so that all ortions of the pulp. may beacted 5 upon in tlie most uniform manner. In Figs. 1 and 2 I have shownaportion of a beating engine or macerator in order that my invention maybe more clearly un derstood, In said figure, 1 represents a tank forholding the pulp, the forward side of which has been removed to disclosethe in terior, and 2 represents the usual central partition of the tankaround which the material circulates. 3- represents the stationaryknives, or bed and 4 represents the beat ing cylinder which is of usualconstruction and comprises a plurality of disks, 5, mounted ona shaft,6, sup orted in vertically ad-- justcd bearings, 7, 0 any desiredconstruction above the bed, 3. The cylinder disks, 5, are provided witha plurality of knife bar receiving recesses, one of which is illustratedin Fig. 2*, each having one wall, 5 substantially radial or parallel toa radius and the opposite wall, 5 inclined with respect thereto anddiverging therefrom outwardl from the bottom of the recess. In accorance with my invention the drum is so located'that when rotated in thedirection of the arrow, Fig; 1, the'radial side of the recess will be onthe forward side of the blade, havin reference to the direction ofrotation. for .convenience of reference herein, 1 will designate thesubstantially being placed in engagement with the recesses of the disks,5, are held in place therein by I a ring, 8, (see Fig. 1) which en agesrecesses in the ends of the knife rs and clamps them firmly to theoutermostdisks,

be readily understood with ref- Oil structure two portions which forconven-- ience I designate as the stock portion, 11, and the edge orblade portion, 12, the stock portion being that port-ion which engagesthe recesses in the cylinder and lies between the spacing blocks orwedges thereof, and

the edge portion being the portion which projects beyond the wedgeblocks. The

stock portion of the bar has two plane. faces, 11 and 11", the face 11being disposed perpendicularly to the inner edge, 11 and the outer edge12 and the face 11 bein disposed angularly to the face 11 and divergingtherefrom outwardly from the inner edge 11 and being so shaped as to fitthe recesses in the cylinders now in ordinary use in this class ofmachines. The stock portion of the bar is provided at each end with arecess or notch, 11, leaving a tongue, 11, between said recess and theinner edge 11 which is of slightly greater depth than-the recess, sothat the retaining rings when shrunk in position will have afirmengagement with said tongue and firmly hold the bars in place. Theedge portion, 12, of the bar is provided with corrugations extendingtransversely of the length of the bar, the alternating corrugationshaving their axes disposed angularly to each other, as indicated by thedotted lines. ww and yy in Fig. 4, and diverging from each otheroutwardly from the stock portion. In the preferred form of my improvedknife bar those corrugations which present their convex faces tothe-forward side of;the bar, the direction of rotation being-indicatedby the arrow, 2, in Figs. 3 and 4, have the apices of said convex facesin substantial alinement with the face, 11*, of the stock 'portion. Thealternate corrugations which present their concave faces, 12* to theforward side of the bar have said faces dis osed angularly to the planeof the rear ace, 11 of the stock portion, the said concave faces beinggiven a rake outwardly and rearwardly for two important purposes, one ofwhich is to produce a wiping action on the pul as the knife bars passover the stationary ed, 3, as is clearly shown in Fig. 1, and the otheris to cause the said concave faces to so act upon the material duringthe revolutions of the cylinder as to throw outwardly the materialbetween adjacent blades of the cylinder and prevent it from travelingaround and around with the cylinder. The

in order that the outer edge of the face,

12, may be ground when necessary without increasing the width of saidface. The said corrugated portions are, however, gradually made thickeradjacent to their line of union with the stock portion, thereby formingcurved or inclined shoulders, 12 and 12* which terminate at the line ofunion with the stock portion indicated by the dotted line, 10, in Fig..3 at which point the bar has its greatest thickness. It will thus beseen that the shoulders, 12 and 12*, in conjunction with the thick endof the stock into which they merge form braces which greatly strengthenand reinforce the corrugated edge ortion of the bar to resist the strainto w ich it is subjected and which is exerted upon the edge portionsubstantially perpendicularly thereto, and this construction inconjunction with the corrugations of the edge portion give'the bladegreat stiffness and strength with a minimum of weight and material. Theshoulders, 12?

on the forward side of the blade which form continuations of the concavefaces 12 also serve another important function in that they act as camsor inclined faces which assist in throwing the material between theadjacent blades of the cylinder outward. It will also be noted that theconvex portions of the corrugations, on the forward side of the bar orblade, have a tendency to crowd the material in opposite directionslongitudinally of the blade and intocontact with the shoulders, 12?, andconcave faces, 12*, and

contribute to this important result;

I have stated heretofore that the forward concavefaces, 12, of the edgeportion are given a rake outwardly and rearwardly, and, as a matter offact, I prefer to impartthis rake to the entire alternating corrugationswhich present their concave faces to the forward side of the bar bybending said corrugations inward at their inner ends and forming aslight shoulder, 12, on the rear face of said corrugations as is clearlyshown in Fig.4, and this is my preferred construction. The rear edge ofthe outer face, 12, at

the rear of said alternating corrugations, will preferably, however, bein alinement with the rear face, 11*, of the stock portion of the bar.

In placing my improved bar in therecesses of the cylinder I prefer toplace it with the front face, 11 of the stock portion,

which is the inclined face of the stock portion, in engagement with thestraight face of the recess, the straight. face, 11, .of the bar beingin contact with the inclined face 5, of the recess, as this imparts arearward rake to the entire bar and tends to give it the sweeping orwiping action before de.

scribed as well as forcingthe material outwardly from the cylinder, andthis efi'ect is increased by imparting therak e before described to thealternate corrugations'presenting their concave faces to-the frcn'tofthe bar, and the shoulders, 12 further assist in forcing the materialoutwardly. By thus setting the bars in the cylinder so as torake Ibackward the advanced portions of. the outermost edge, 12, extendoutwardly from the cylinder agreater distance. than the rearmostportions of said edge. Hence in looking down upon the corrugated edge asin Fig. 5, the outer extremity thereof appears I 'tobe slightlycurvedand as the edge passes over the straight faces of the knives ofthe bed 3, opportunities'are provided for the 1r aterial to continuallyredistribute itself as it is acted upon, and .thusa .more uniformtreatment of the pulp is efiected. t

In Fig. 7, I have shown .a slight modification of my improved knife barwhich is subtions have their axes parallel to the plane stantiallyidentical with the form shown in Figs. 3 to 16 inclusive except that thealternate corrugations presenting their concave faces .to the forwardside of the edge or blade portions are not given the backward rake whichI have previously described, but, on the contrary, the said alternatecorrugation being indicated generally as 22. Of

this form of bar the rear face 21* is disposed substantiallyperpendicularly to .the inner edge 21 and the outer edge 22, and formsthe straight side while the face 21 of the stock portion diverges fromthe face 21 and engages the straight face 5 of the recess in thecylinder. Thus the bar whenplaced in the cylinder will have a generalbackward rake as before described with reference to the preferredform ofblade, thus impart-ing the sweeping or wiping action onthe material andtending to discharge the same outwardly from between the bars, whichlatter action will be facilitated by the forwardly disposed shoulders,22 The shoulders 22 and 22 also reinforce the edge or blade portion andtransmit the strain on the outer edge of the bar to the thickest(portion of the bar-andlthis-niodified form of knife bar is capable ofadvantageous use, although I prefer the constructionillustrated in Figs.

3 to (S. ln'the tank 1 in conjunction withthe bed, 3, are usuallyprovided an inclined surface, 25, on one side ofthe cylinder and a,concave surface, 26, on the other side partially surrounding thecylinder for the purpose of deflecting the material to the cylinder andbed and insuring the propulsion of the materialin the tank so as tobring fresh portions of the material continuously between the cylinderand bed. By reference to Fig. 1 it will be observed that in the rotaticnof the cylinder the corrugated knife bars approach the bed, 3, with aWiping or sweeping'action which disintegrates the fibrous materialwithout cutting or shearing the fibers thereof, and it will also be seenthat the material which necessarily is' collected between the adjacentblades of the cylinder will be discharged therefrom, over the top edgeof the concave portion 26, the material then passing aroundthe centerpartition, 2, and being continuously treated until the proper degree ofmaceration has been attained.

What I claim and desire tosecure by Letters Patent is 1. A knife bar forbeating engines comprising a stock portion to engage the beatingcylinder and an edge portion of reduced thickness extending along theouter portions of the bar, and corrugated trans- .versely of the lengthof the bar, the alternate corrugations aving their axes inclined to'eachother, said axes diverging toward theouter edge of the bar.

- 2. A knife bar for beating engines comprising a stock portion toengage the heatingcylinder and a reduced edge portion corrugatedtransversely of the length of .said bar, the alternate corrugationshaving their axes disposed angular-1y to each other and diverging towardthe outer edge of the knife .bar, said corrugations increasing inthickness at their junction with the stock portion, formin inclinedshoulders for reinforcing the e ge portion of the bar and assisting indischarging material from between adjacent bars ofa cylinder.

3. A knife bar for beating engines comprising a stock portion to engagethe beating cylinder having its front and rear faces disposed angularlyto each other and diverging from the inner edge of the bar outwardly,and a reduced edge portion corrugated transversely of the length of thebar, the alternate corrugations having their axes disposed angularly toeach other and diverging outwardly from the stock portion, saidcorrugated portions being gradually increased in thickness adjacent totheir union with the stock portion to form inclined shoulders forassisting in discharging material from between adjacent bars .of acylinder said bar having its greatest thickness at the union of saidshouldered portions with the stock portion.

4. A knife bar for beating engines comclined shoulders, said bar havingits great-.

est thickness at the union of said shouldered portions with the stockportion, said corrugated portions having the apices of their alternatecorrugations at the outer edge of the bar, substantially in the planesof the front and rear faces respectively of the stock portion of thebar.

5. A knife bar for beating engines comprising a stock portion to engagethe beating cylinder and an edge portion of reduced thickness, said edgeportion being corru-' gated transversely of the length of the bar, thealternate corrugations having their axes disposed angularly to eachother and diverging from their union with the stock portion outwardly,the corrugations presenting their concave faces 'toward the forward faceof the bar having their forward faces inclined: outwardly and rearwardlywith respect to the plane of the rear face of the stock portion toassist in throwing the material outwardly and imparting a wiping actionto the material in connection with the stationary knivesof the machine.

6. A knife bar for beating engines comprising a stock portion to engagethe beating cylinder and an edge portion of reduced thickness, said edgeportion being corrugated transversely of the length of the bar, thealternate corrugations having their axes disposed angularly to eachother and diverging from their union with the stock portion outwardly,the corrugations presenting their concave faces toward the forward faceof the bar having the portions nearest the stock portion set in from theplane of the rear face of the stock portion, and their vaxes inclinedoutwardly and rearwardly therefrom with respect to the plane of the rearface of the stock portion to impart a wiping action to the material andto as-' sist in throwing the material outwardly.

7. In a beating engine,-the combination with the cylinder provided withknife re ceivmgrecesses, of a knife bar having a. stock portion toengage sald recesses, and an edge portion of reduced thickness extendingalong the outer portions of the bar, and corrugated transversely of thelength of the bar, the alternate corrugations having their outer facesinclined to each other and diverging toward the outer edge of the bar.said stock and recesses being constructed to hold the knife bar in suchposition that the forward faces of the concave portions of the knife barwill extend rearwardly of a radial position, to facilitate the dischargeof material from between adjacent knife bars.

8. In a beating engine, the combination with the cylinder rovided withknife receiving recesses, o a knife bar having a stock portion to engagesaid recesses and an edge portion of reduced thickness extending alongthe outer portions of the bar, and corrugated transversely of the lengthof the bar, the alternate corrugations having their outer faces inclinedto each other and diverging toward the outer edge of the bar, said stockand recesses being constructed to hold the knife bar in such positionthat the axes of the convex portions on the forward face of the barwillnot .extend forward of a radial position, and the axes of thecohcave portions .will' extend rearwardly of a radial position, tofacilitate the discharge of material from between adjacent bars of thecylinder.

9. In a beating engine the combination with the cylinder provided withknife receiving recesses, each having one face disposed substantiallyradially and the opposed face inclined thereto and diverging therefromoutwardly from the bottom of the recess, of a knife bar having a stockportion provided with a longitudinal face disposed substantiallyperpendicularly to the edge faces of the knife bar and the opposite faceinclined thereto and diverging therefrom outwardly from the inner edgeof the bar,

said bar'having an edge portion of reduced thickness corrugatedtransversely of the length of the bar, the alternate corrugations havingtheir axes disposed angularly to each other and diverging outwardly fromthe v stock portion, said bar having the perpendicular face against theinclined face of the engaged recess, and means for securing said bar insaid recess.

In testimony whereof I afiix my signature EUGENE G. KEN EDY, LOUISE A.BAUER.

